SEGMENT REPORTING (Other Income (Expense)) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ (227,863)	$ 27,870
Principal investment income (loss)	13,771	14,385
Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other income from Consolidated Funds eliminated in consolidation, net	5,464	(4,497)
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Investment (income) loss - unrealized	(100,633)	11,205
Other (income) expense, net	0	1
Operating segment \| Ares Management L.P
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	13,771	14,385
Investment (income) loss - unrealized	105,594	(16,183)
Interest and other investment (income) loss - unrealized	(4,961)	4,978
Operating segment \| Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	(227,863)	27,870
Reconciling items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	241,634	(13,485)
Principal investment income (loss)	(75,988)	29,892
Other (income) expense, net	22	(1)
Reconciling items \| Subsidiaries \| Non-Controlling interest
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	19,683	(16)
Reconciling items \| Performance income reclass
Segment Reporting, Other Significant Reconciling Item [Line Items]
Performance fee reclass	1,717	(606)
Reconciling items \| Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other (income) loss from Consolidated Funds added in consolidation, net	198,245	(31,207)
Eliminations \| Consolidated Funds
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other income from Consolidated Funds eliminated in consolidation, net	(3,819)	(372)
OMG
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total segment realized net investment income	$ 1,141	$ 30

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